Slide 1

Team Clean CutComposite Decking BladeSponsors: Team Members:Brian NormanCraig DanielsTed FlorenceWesley AndersonVince Mayer

Advisor: Jay McCormack1Project DefinitionPrimary Goal: Force Analysis ApparatusMeasures force as a function of blade positionWill allow different blades to be testedUse data to develop an empirical model for the cutting of composite deckingRelocatable to Bullet Tools

2Project DefinitionSecondary Goal: Composite Decking BladeDevelop a blade that will reduce the blow out phenomena seen in composite decking by 50%

3Projected Time Line for 2011 Semester

4Specify when week 0 is4ExpendituresTotal Budget: $700Cost as of this presentation: $0Purchases to be made:Linear potentiometerStrain gage adhesiveHigh Precision Resistors5BackgroundReference BookThe Science and Engineering of Cutting: The Mechanics and Processes of Separating, Scratching and Puncturing Biomaterials, Metals and Non-metals By Tony AtkinsExperimental DesignDecisionsStrain Gauge PlacementLinear Potentiometer DesignData Acquisition

6Experiment SpecsGeneralSpecificMeasurementDetermine force acting on bladeDetermine force acting on blade as position variesBe able to state the magnitude of force acting on blade for the whole cutAccurateHigh resolutionRecord at least 1 sample per mm of travelAccurate ContLow uncertaintyUncertainty of measurements within 10% of reading with 95% confidenceFlexibleVarious materials and sizes can be testedCan test samples up to 12 wide and 1.5 thick7Experiment Specs ContGeneralSpecificMeasurementRelocatableThe experiment setup can be moved to various locationsCan be relocated to Bullet Tools in Hayden, IDRepeatableCan be performed on many samplesExperiment can be performed 500 times without replacement of componentsEase of use Data from experiment is easy to interpret and storeData is digitally recorded on a personal computer8FBD & Stress Analysis

9Experiment 1

10Crack Formation

11Experiment Design 2

12Shear Moment Diagram

13Experiment 3

SATEC T500014Problems/ConcernsAccuracyWhat will it mean?Will the data be useableDifficult to model blade as a wholeHow will it help us solve our problem?15Blade DesignsBlade MaterialsWidthSurface FinishStandard Magnum Shear WidthI-9 (9 inches)Bullet ToolsStandard Blade Finish ProcessCustom Width(Width of Standard Piece of decking)Machining/Fine Polish to strengthen thinner blade

D2 Tool Steel

154 CMStainless SteelBohlerN680Stainless SteelThis material has the addition of vanadium and nitrogen for increased strength440 CCStainlessSteelHigh Chromium

16Bench Marks

ProsNo BlowoutConsHeavyNoisyLots of Saw Dust

17Redesign SpecsGeneralSpecificMeasurementImprove CuttingImprove cutting performance on composite decking materialsReduce surface area of blowout phenomenon on composite decking by 50%Ease of useShould not be more difficult to operate than original modelCan be operated by one personNeatDoesnt create a mess when cuttingCutting does not produce dustAdaptableAlternative cutting methods must be adaptable to original productResuableThe redesigned product should last at least as long as originalThe product should last X without needing replacement or sharpening18New Potential DesignsSharper Blade Angle